The French ironclad Surveillante was a Provence-class armored frigate built in the 1860s for the French Navy. She was ordered on November 16, 1860, laid down at Arsenal de Lorient on January 28, 1861, and launched on August 18, 1864. The vessel measured approximately 82.9 meters (272 feet) in length, with a beam of 17.06 meters (56 feet) and a draft of 8.4 meters (27 feet 7 inches) at deep load, displacing about 5,810 metric tons. Her crew numbered around 579–594 officers and sailors. Surveillante was powered by a single two-cylinder horizontal-return compound steam engine, which drove her propeller using steam generated by eight boilers. Her engine produced 3,254 metric horsepower, enabling her to reach a speed of 13.2 knots during sea trials. She had a range of 2,410 nautical miles at 10 knots, and was rigged with a three-masted barque sail plan covering 1,960 square meters. The vessel’s armament was a mixed battery, initially consisting of four 240 mm Modèle 1864 rifled muzzle-loading guns and six 194 mm smoothbore guns on the gundeck, supplemented by additional guns on the quarterdeck and forecastle, including 164.7 mm and 194 mm guns. By 1869–1870, her armament included eight 240 mm RMLs and four 194 mm chase guns. The armor protection featured 150 mm of wrought iron along the sides, backed by 750 mm of wood, with the battery protected by 110 mm armor backed by 610 mm of wood, and the conning tower armored with 100 mm plates. In service, Surveillante played a minor role in the Franco-Prussian War of 1870–1871, serving as flagship in the blockade of German ports and the Baltic Sea, although her operational impact was limited. She was decommissioned in 1871, rearmed, and reactivated several times, notably participating in the occupation of Tunisia in 1881. The ship was eventually condemned in 1887, served briefly as a guard ship, and later as a coal storeship before being scrapped in 1898. Her service reflects the transition period of naval technology from traditional wooden ships to ironclad warships, marking her significance as part of France’s evolving naval power during the 1860s and 1870s.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.